public class ReplacementTester

{
   
public static void main(String[] args)
   
{
      
String greeting = "Hello, elite hacker!";
      
	   int len = greeting.length();
		
char a;
		
for(int i=0;i<len;i++)
{
			 
a=greeting.charAt(i); 
			
if(a=='e'){
				greeting=greeting.replace('e','3');
			 }
			 
if(a=='i'){
				greeting=greeting.replace('i','1');
			 }
			 
if(a=='l'){
				greeting=greeting.replace('l','7');
			 }
			 
if(a=='o'){
				greeting=greeting.replace('o','0');
			 }
		
}
		
System.out.println(greeting);


      
// System.out.println(modifiedGreeting);
      System.out.println("Expected: H3770, 371t3 hack3r!");
   
}

}